Я видимо зря не верил.
Rolling behind a screen lets you fudge the results if you want to. If two critical hits in a row would kill a character, you could change the second critical hit into a normal hit, or even a miss. Don't distort die rolls too often, though, and don't let on that you're doing it. Otherwise, your players might think they don't face any real risks-or worse, that you' re playing favorites.